Housing for hand brake winding mechanism



Aug. 9,' 1932. R. w. BURNETT 1,870,935

HOUSING FOR HAND BRAKE- WINDING MEGHANISM Filed Dec. 29, 192e 2 sheets-sheet 1 Aug- 9, 1932! R. w. BLJRNETT, 1,870,985

HOUSING FOR HAND BRAKE WINDING MECHANISM Filed Dec. 29, 1928 2 Sheets-Sheet 2 Patented Aug. 9, 1932 PATENT OFFICE RICHARD W. BURNETT, l0F CHICAGO, ILLINOIS HOUSING FOR HAND BRAKE l-'INDING Application led December 29, 1928, Serial No. 329,243, and in Canada February 25, 1927.

compact and at the same time provide great strength so as to withstand the severe strains incident to its firm attachment to a car wall and also withstand the severe stresses andYV pressures imparted by the winding mechanism during the brake setting operation.

Another important object of the invention is to provide a housing of such configuration that, in addition to providing strength, the plates are of such configuration that the housing may be manufactured by stamping or pressing methods, thereby insuring a high degree of accuracy in the formation of the' housing members and at the same time permit them to .be manufactured in large numbers at a minimum cost. Another object is to provide aback plate which may be positioned fiat against the wall of a railway car and which, when so 25 applied, will provide av relatively large attaching base whereby the stresses developed during the brake setting operation will be distributed over a large area of a car wall. A still further object is to provide novel 30 reinforcements of the front and back plates v at the points where the members of the winding mechanism are attached to or supported bythe housing.

Myinvention is illustrated in two specific embodiments in the accompanying drawings wherein:

Fig. 1 is a vertical cross section of a hand brake winding mechanism attachedto a railway car and showing the various operating parts of the winding mechanism supported within a housing constructed in accordance with my invention.

Fig. 2 is a cross section taken on line 2-2 through the car wall and housing), the operating parts of the mechanism eing omitted from this figure.

Fig. 3 is a front face view of my improved housing illustrating the same as attached to a railway car wall.

Fig. 4 is a view similar to Fig. 3, but illus- Referring first to Figs. 1 to 3 inclusive of A.y

the drawings. The winding mechanism illustrated is preferably the same as that illustrated in my cope'nding application 229,967, filed October 31,1927, and of which the present application is a continuation in part.

The winding mechanism may be described briefiy as consisting of a large gear and winding drum 10 rotatable about a horizontal shaft 11 and meshing with a pinion 12.

The pinion 12 is preferably formed integrally with a shaft 13 and a ratchet wheel 14. The shaft 13 projects out of the enclos.- ing housing and is providedA at one end with an operating hand wheel 15. The numeral 16 designates a locking pawl formed with suitable trunnions 17 for supporting it in a position to engage with the teeth of the ratchet wheel 14. The pawl 16 is moved to its holding and also to its releasing position by means of a cam 18 adapted to be operated by a lever 19.

The improved housing, in which the operating parts of the mechanism above described are enclosed, consists of a back plate :y

20 and a dished front member 21 provided with a flange 22 forvattachment to the back plate. The front and back plates are formed with oppositely disposed openings 23, 24, 28

" and 29 for the reception of the several shafts of the winding' mechanism. The openings 23-23 receive reduced portion 27 of the shaft 11. After the winding drum is applied,

' the reduced ends of the shaft 11 are preferably riveted over so as to clamp the front and back members of the housing against the shouldered end portion of the shaft. The front and back members of the housing are preferably pressed inwardly adjacent the openings 23 so as to provide inwardly projecting bosses 23a which serve to provide suitable abutments for spacing the unitary gear and winding drum from the opposite sides of the casing. The inwardly pressed bosses alsoserve as reinforcements of the front and back members adjacentthe openings for the shaft 11, and also provide suit ab e pockets for the riveted over ends of the shaft. With this construction the back plate 20. may be positioned fiat a ainst the end wall of the railwa car wit outdanger of the shaft 11 interferlng with said flat bear-l ing against the car wall. The de ression 23a in the front face of member 21, 1n addition to providing an inwardly extending boss, prevents the end of the shaft 11 from pro- )ecting out beyond the front face of the member 21. The openings 241 receive the operating shaft 13 and are formed with the inwardly projecting bosses 26. Preferably bearings 24e are tted in the openings 24, the said bearings being of cast bronze or any suitable bearing material. The inwardly projectin bosses 26-26 permit the outer faces of t ese bearings to be disposed Within the outer planes of the back and front members. The openings 28, 29 4receive the trunnions of the pivoted pawl16 and the cam 18, respectively# The back plate only is formed with inwardly pressed bosses surrounding ythese openings so as to provide suitable clearance for the heads of the said trunnions.

The housing is attached to the side wall 25 of the car by means of suitable bolts 30 extending through the flange 22 in the marginal portion of the back plate. Preferably the attaching flange is relatively narrow so that a large portion of the clamping pressure incident to attaching the housing to a car wall is taken up by the trussing effect of the side walls 31 of the dished front member. The double thickness of metal at the point of attachment of the flanges, together with the angular walls 31 of the front member, provide sufficient rigidity to prevent distortion of the' housing when it is clamped to an irA regular surface of the car wall. 'The angular construction of the housing makes it possible to use suflicient force in attaching it to a car wall, for example a sheet' metal car wall, to force the surface of the wall to conform with the attaching flange of the housing, thereby avoiding distortion of the housing and the attending mal-alignment of the shaft bearings and other operating parts of the winding mechanism. In this connection it will be noted that the housing formed in the manner above noted, makes it possible to use the housing itself as a supporting frame for the operating mechanism therein enclosed.

In Figs. 4 and 5, I have illustrated a modified construction of housing.y This form of the invention is in all respects the same as that previously described except that the front member of the housing is provided with a series of reinforcing and rigidi 'ng corrugations 32 which extend radially rom the inwardly pressed boss 33 surrounding the drum shaft opening 33". These reinforcing corrugations are preferably pressed A outwardly from the sheet. The said corrugations terminate preferably near the side flange of the housing so as to provide in efextends entirely across the front face of the front member of the housing. This corrugation reinforces the lower margin of the front member adjacent the open lower end of the housing. This embodiment, like the form previously illustrated, is provlded with assembling rivets 35 for vholding the front and back members in their proper position before the winding mechanism is applied. This embodimentl is shown with the back plate 20 attached directly to a sheet metal wall 25a of the car. This manner lof use, however, is common to both forms of the invention. In other respects, the modified construction may be and preferably is the same as the construction shown in Figs. 1 to 3- inclusive.

This application is a continuation in art of my application Serial No. 229,967 ed October 31, 1927, which latter application is a division of my application Serial No. 109,- 061, filed May 14, 1926. The present appllcation, however, does not claim, apart from the housing structure, the holding and releasing mechanism per se; the combination of the winding mechanism and holding and releasing mechanism; the combination of the vertic`al hand wheel and winding drum; and the combined gear and winding drum. The mechanisms and devices above noted are claimed in the order above mentioned in my copendin applications as follows: Serial No. 229,967, ed October 31, 1927; 281,088, filed May 28, 1928; 349,817, filed March 2,5, 1929; and 349,818, filed March 25, 1929.

I claim:

1. In brake operating mechanism comprising a chain, a winding member and gearing therefor, and pivoted holding and releasing devices; a housing to enclose said winding member and gearing devices comprising a pressed steel front plate, a pressed steel back plate, one dished to provide a mechanism compartment open at one end to accommodate lateral movement of the chain and l shafts of said winding member and said gear ing therefor and formed with inwardly 'projecting bosses through which said bearing openings are made, one of said plates being formed with reinforcing ribs extending ra'- A dially from one of said bearing openings.

2. In brake operating mechanism comprising a chain, a winding member and gearing therefor, and pivoted holding and releasmg devices; a housing to member and gearing pressed steel front plate, a pressed steel back plate, one being of a configuration open at one end dished and provided with a flange extending around three sides thereof forattachment to the other, said -plates bemg formed with oppositely disposed bearing openings for the shafts for said windmg member and said gearing therefor and formed with inwardly projecting bosses through which said bearing openings are made, the dished plate being 'formed with side walls, portions of whichare parallel with each other and portions of which are curved outwardly to providev clearance for the gearing, the front side of said dished plate being formed with ressed reinforcing ribs extending radially rom one of said bearing openm s.

g3. In hand brake operating mechanism comprlsing winding means and means forl holding and releasing said winding means, a housing. for enclosing said mechanism and providin a supporting frame therefor comprising gromt and back plates, one of said plates being pressed to form a, mechanism chamber of dished configuration open at one end and having vertical side walls curved to conform generally with the shape of parts of said mechanism, the opposite ends of said dished portion being of less width than the intermediate portion so as to provide attaching flanges which taper in width toward the maximum width of said dished portion, and a reinforcing rib formed along said open end to rigidiy the dished portion against distortion adjacent said open end.

4. In hand brake mechanism for railway cars including revoluble elements for ing and for releasing the brakes; a housing in which said revoluble elements are journaled comprising a back plate providing a large bearing area for attachment to a wall of the ca r, a front plate dished outwardly to provide a compartment for said revoluble elements open at the bottom, ange's at the sides of said dished structure for attachment to the back plate, the lower portion of said dished structure being bulged laterally to provide said chamber with an enlarged portion, the curved walls of which serve'as reinforcing and stiiening elements for the side attaching flanges and for the said dished portion of the plate.

RICHARD W. BURNETT.

contain said winding devlces comprising a apply- 

